Put/Call Ratio
The put/call ratio divides put activity by call activity, using either volume or open interest, as a rough gauge of hedging and fear versus speculative appetite. Readings near long-run averages carry little signal; extremes are often read contrarian - panicked put-buying has historically clustered near lows rather than ahead of them.
A ratio of 1.0 means puts and calls traded in equal size. Index put/call ratios typically run above equity-only ratios because institutions persistently hedge with index puts; each series is read against its own baseline rather than an absolute threshold.
The interesting information is at the extremes and in the trend. Put volume surging while price is already falling is hedging demand peaking; the same measure declining while price still falls is a classic exhaustion signature - the last hedgers have already hedged. Our own research uses that decelerating-put-flow pattern as one of several capitulation tells.
Caveats are real: puts are also sold to collect premium, calls are used to hedge short exposure, and dealer intermediation blurs who initiated what. The ratio is context about aggregate flow, not a standalone signal.
Frequently asked
Is a high put/call ratio bearish?
Not by itself - it shows heavy put activity, which is usually hedging. At panic extremes it has historically coincided with exhaustion near lows, which is why many read it contrarian.
Which put/call ratio should I watch?
They answer different questions: index-heavy readings capture institutional hedging; equity-only readings tilt toward retail speculation. Each is read against its own typical range.
Related terms
This term is part of a bigger picture: Gamma Exposure, Explained — the complete guide →